cacl2 treatment followed by heat shock is the most common method for artificial transformation. here, the cells were transformed using cacl2 treatment either with heat shock (standard protocol) or without heat shock (lab protocol) to comprehend the difference in transformation efficiency. the bl21 strain of escherichia coli (e. coli) was being susceptible using cacl2 treatment. some cells were ...

We make a comparative study of the luminescent properties of InGaP films grown on GaAs substrates by two different growth techniques: liquid phase epitaxy (LPE) and metal-organic vapor phase epitaxy (MOVPE). The grown InxGa1KxP (xz0.5) films were nearly lattice matched to GaAs and had the same thickness of approximately 0.5 mm. Photoluminescence (PL) measurements were performed in a wide temper...

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The STARTWAVE (STudies in Atmospheric Radiative Transfer and Water Vapour Effects) project aims to investigate the role which water vapour plays in the climate system, and in particular its interaction with radiation. Within this framework, an ongoing water vapour database project was set up which comprises integrated water vapour (IWV) measurements made over the last ten years by ground-based ...

We studied the effect of ethanol vapour on parameters semiconductor-metal transition in a polycrystalline vanadium dioxide powder stable monoclinic phase a-VO2. It was synthesised by reducing pentoxide with oxalic acid while heated air. The DC electrical resistance samples between room temperature and 100оС tubular heater, microcompressor-generated air stream saturated ethyl alcohol vapour. fou...

In the present work, the performances of improved two-stage multi inter-cooler trans- critical carbon dioxide (CO2) refrigeration cycles with ejector and internal heat exchanger have been examined. In the new improved cycles, an internal heat exchanger is append to the cycles. Also, second inter-cooler in improved cycles, cooled with the refrigeration of the cycle, so that in first c...

A new kinetic model for heating and evaporation of Diesel fuel droplets is suggested. The model is based on the introduction of the kinetic region in the immediate vicinity of the heated and evaporating droplets, where the dynamics of molecules are described in terms of the Boltzmann equations for vapour components and air, and the hydrodynamic region. The effects of finite thermal conductivity...